中文摘要：本研究旨在验证并优化一种农药检测方法，该检测方法结合SLE-LTP萃取法、GC-MS技术以及固液萃取法等技术对胡萝卜样本中甲基吡、利谷隆和腐霉利等农药残留进行萃取、检测和量化。该方法对甲基吡、利谷隆和腐霉利的检测定量限分别为0.48 、0.69和0.65mg/kg，定量限值均低于国际规定的利谷隆和腐霉利的定量限检测值（1.0mg/kg），并且整体回收率在90%到110%之间。
外文摘要：This study aimed to optimize and validate an analytical method for extraction, detection, and quantification of haloxyfop-methyl, procymidone, and linuron pesticides in carrot samples using solid-liquid extraction methods and low temperature partition (SLE-LTP), accompanied by gas chromatography coupled to mass spectrometry (GC-MS). For SLE-LTP technical optimization, we utilized a complete factorial planning, which had as its variables, agitation time, freezing time, and the correct sample mass/extracting solution volume ratio. The organic extract obtained was analyzed by GC-MS. To test the performance of this procedure, the method was validated and applied to the monitoring of pesticide residues in 20 samples of carrot produced in Alto Paranaiba, Minas Gerais, Brazil. The proposed method showed linearity between 0.5 and 3.5 mg center dot kg(-1) with correlation coefficients greater than 0.99. The quantification limits were 0.48 mg center dot kg(-1) for haloxyfop-methyl, 0.69 mg center dot kg(-1) for linuron, and 0.65 mg center dot kg(-1) for procymidone, values below the maximum residue limit provided by international legislation of 1.0 mg center dot kg(-1) for linuron and procymidone. The use of haloxyfop-methyl is not approved in the cultivation of carrot. The recovery percentages were between 90 and 110 %, with a coefficient of variation of less than 12 %. Ten percent of the carrot samples monitored showed residues of linuron and procymidone in concentrations exceeding those permitted by Brazilian law.
外文关键词：Pesticide analysis；Carrot；Gas chromatography
作者：Emiliane Andrade Araújo；Marcelo César Rosa Lara； Marcelo Rodrigues dos Reis
作者单位：Instituto de Ciências Tecnológicas e Exatas, Avenida Doutor Randolfo Borges Júnior, Universidade Federal do Triângulo Mineiro,Uberaba, Minas Gerais 38810-000, Brazil
期刊名称：FOOD ANALYTICAL METHODS
期刊影响因子：2.167
出版年份：2015
出版刊次：9
点击下载：应用SLE-LTP萃取法和GC-MS技术检测胡萝卜中甲基吡、利谷隆和腐霉利残留